feat(synced-lyrics): Improve LRC parsing (#4269)

src/plugins/synced-lyrics/parsers/lrc.test.ts

@@ -0,0 +1,144 @@
+import { test, expect } from '@playwright/test';
+
+import { LRC } from './lrc';
+
+test('empty string', () => {
+  const lrc = LRC.parse('');
+  expect(lrc).toStrictEqual({ lines: [], tags: [] });
+});
+
+test('chorus', () => {
+  const lrc = LRC.parse(`\
+[00:12.00]Line 1 lyrics
+[00:17.20]Line 2 lyrics
+[00:21.10][00:45.10]Repeating lyrics (e.g. chorus)
+[mm:ss.xx]Last lyrics line\
+`);
+
+  expect(lrc).toStrictEqual({
+    lines: [
+      { duration: 12000, text: '', words: [], time: '00:00:00', timeInMs: 0 },
+      {
+        duration: 5020,
+        text: 'Line 1 lyrics',
+        words: [],
+        time: '00:12:00',
+        timeInMs: 12000,
+      },
+      {
+        duration: 3990,
+        text: 'Line 2 lyrics',
+        words: [],
+        time: '00:17:20',
+        timeInMs: 17020,
+      },
+      {
+        duration: 24000,
+        text: 'Repeating lyrics (e.g. chorus)',
+        words: [],
+        time: '00:21:10',
+        timeInMs: 21010,
+      },
+      {
+        duration: Infinity,
+        text: 'Repeating lyrics (e.g. chorus)',
+        words: [],
+        time: '00:45:10',
+        timeInMs: 45010,
+      },
+    ],
+    tags: [],
+  });
+});
+
+test('attributes', () => {
+  const lrc = LRC.parse(
+    `[ar:Chubby Checker oppure  Beatles, The]
+[al:Hits Of The 60's - Vol. 2 – Oldies]
+[ti:Let's Twist Again]
+[au:Written by Kal Mann / Dave Appell, 1961]
+[length: 2:23]
+
+[00:12.00]Naku Penda Piya-Naku Taka Piya-Mpenziwe
+[00:15.30]Some more lyrics ...`,
+  );
+
+  expect(lrc).toStrictEqual({
+    lines: [
+      { duration: 12000, text: '', words: [], time: '00:00:00', timeInMs: 0 },
+      {
+        duration: 3030,
+        text: 'Naku Penda Piya-Naku Taka Piya-Mpenziwe',
+        words: [],
+        time: '00:12:00',
+        timeInMs: 12000,
+      },
+      {
+        duration: Infinity,
+        text: 'Some more lyrics ...',
+        words: [],
+        time: '00:15:30',
+        timeInMs: 15030,
+      },
+    ],
+    tags: [
+      { tag: 'ar', value: 'Chubby Checker oppure  Beatles, The' },
+      { tag: 'al', value: "Hits Of The 60's - Vol. 2 – Oldies" },
+      { tag: 'ti', value: "Let's Twist Again" },
+      { tag: 'au', value: 'Written by Kal Mann / Dave Appell, 1961' },
+      { tag: 'length', value: '2:23' },
+    ],
+  });
+});
+
+test('karaoke', () => {
+  const lrc = LRC.parse(
+    '[00:00.00] <00:00.04> When <00:00.16> the <00:00.82> truth <00:01.29> is <00:01.63> found <00:03.09> to <00:03.37> be <00:05.92> lies',
+  );
+
+  expect(lrc).toStrictEqual({
+    lines: [
+      {
+        duration: Infinity,
+        text: 'When the truth is found to be lies',
+        time: '00:00:00',
+        timeInMs: 0,
+        words: [
+          {
+            timeInMs: 4,
+            word: 'When',
+          },
+          {
+            timeInMs: 16,
+            word: 'the',
+          },
+          {
+            timeInMs: 82,
+            word: 'truth',
+          },
+          {
+            timeInMs: 1029,
+            word: 'is',
+          },
+          {
+            timeInMs: 1063,
+            word: 'found',
+          },
+          {
+            timeInMs: 3009,
+            word: 'to',
+          },
+          {
+            timeInMs: 3037,
+            word: 'be',
+          },
+          {
+            timeInMs: 5092,
+            word: 'lies',
+          },
+        ],
+      },
+    ],
+    tags: [],
+  });
+});